JP3168796B2 - Front structure of vehicle with reduced air resistance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air resistance reducing vehicle front structure for reducing the air resistance of an automobile.

[0002]

2. Description of the Related Art Conventionally, as an example of an air resistance reducing vehicle front structure for reducing the air resistance of an automobile, Japanese Utility Model Application Laid-Open No.
No. -183931 has been devised.

As shown in FIG. 7, an opening 72 is formed in a front portion 70 of the vehicle in the air resistance reducing vehicle front structure, and the wind passing through the opening 72 causes the rear of the opening 72 to be formed. A radiator (not shown) provided in the apparatus is cooled. A grill movable section 74 is swingable about a shaft 76 in the opening 72.
At 4, the opening 72 is closed to reduce the air resistance of the vehicle body. On the other hand, when traveling uphill, as shown in FIG. 8, the cooling performance during uphill traveling is satisfied by swinging the grill movable section 74 and opening the opening 72.

[0004]

However, this front structure of a vehicle with reduced air resistance requires an actuator or the like for swinging the grill movable portion 74 to a predetermined position in accordance with the running state. For this reason, there is a problem that the weight of the apparatus increases and the cost increases.

[0005] In view of the above facts, the present invention reduces the air resistance during high-speed running without increasing the weight and the cost, and at the same time, reduces the air resistance at the front of the vehicle when running uphill. The purpose is to get the structure.

[0006]

According to the present invention, there is provided an air resistance reducing vehicle front structure comprising a bumper disposed at a front end of a vehicle body along a vehicle width direction, and a bumper provided in an engine room and cooled by outside air. In a front body structure of an automobile having a cooling body and an underplate disposed on a lower surface of an engine room, a front outside air intake formed on a front surface of a bumper, and a lower inner peripheral portion of the front outside air intake. A pressure control plate configured and curved toward the rear upper side of the vehicle body, a lower external air intake provided between the lower surface of the bumper at the front position of the object to be cooled and the underplate, and a rear side of the lower external air intake. An under plate front portion formed along the air flow flowing in the direction of the under plate along the lower surface of the bumper, and a baffle plate extending from the air cut portion at the front end of the under plate front toward the object to be cooled. For example, by the pressure control plate, the front
Cooled by air pressure blown from outside air intake
Empty space from the front of the body to the inside of the lower outside air intake
It is characterized by changing the atmospheric pressure .

[0007]

With the air resistance reducing vehicle front structure according to the present invention, when the vehicle enters a high speed state, the air blown from the front outside air intake is sent to the object to be cooled along the pressure control plate. At this time, the air pressure sent to the object to be cooled is large and the air pressure at the front part of the object to be cooled increases, and the air pressure inside the lower outside air intake rises, and the air pressure inside the lower outside air intake becomes:
The airflow flowing in the direction of the underplate along the lower surface of the bumper is equal to or higher than the air pressure near the lower outside air intake. Therefore, the airflow flowing in the direction of the underplate along the lower surface of the bumper does not enter the vehicle body through the lower outside air intake, but reaches the front of the underplate, so that air resistance during high-speed traveling can be reduced. it can.

On the other hand, when the vehicle is traveling uphill, the air pressure blown from the front outside air intake is lower than in a high-speed state. Therefore, the air blown from the front outside air intake is
Along the pressure control plate, it is sent to a portion above the object to be cooled as compared to the high-speed state. For this reason, the air pressure from the front of the cooled object to the inside of the lower outside air intake is lower than in the high-speed state, and the air pressure of the inside of the lower outside air intake is in the direction of the under plate along the lower surface of the bumper. Becomes lower than the air pressure in the vicinity of the lower outside air intake of the air flowing to the air. by this,
Part of the air flowing in the direction of the under plate along the lower surface of the bumper is taken into the lower outside air intake by the air cut section and sent to the cooled object. Therefore, the cooling performance during uphill traveling can be satisfied.

Further, in the structure of the vehicle front part with reduced air resistance according to the present invention, unlike the prior art, there is no need for a movable grill portion, an actuator or the like, so that there is no increase in weight and cost.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the front structure of a vehicle with reduced air resistance according to the present invention will be described below with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow IN indicates an inward direction of the vehicle width, and an arrow UP indicates an upward direction of the vehicle body.

As shown in FIG. 2, a front bumper 11 is disposed along the vehicle width direction at the front end of a front body 10A of the vehicle body 10. The front bumper 11 is located at the center of the front surface 11A of the front bumper 11 in the vehicle width direction. Has a bumper opening 12 as a front outside air intake formed in a long rectangular shape in the vehicle width direction. In addition, a cooler condenser 14 is disposed behind the bumper opening 12 as a cooled object.

As shown in FIG. 3, a central portion in the vehicle width direction between the lower surface 11B of the bumper 11 and the under plate 16 at a position in front of the cooler condenser 14 has a lower rectangular portion elongated in the vehicle width direction. An extra duct 18 is formed as an outside air intake.

As shown in FIG. 1, the front body 10
Inside A is an engine room, in which an engine not shown is arranged. A cooling fan 20 is arranged on the front side of the engine in the vehicle longitudinal direction. A radiator 22 is arranged between the cooling fan 20 and the cooler condenser 14.

At the upper edge of the bumper opening 12, the air guide plate 2
4 are integrally formed. The baffle plate 24 is curved in an arc shape toward the rear upper side of the vehicle body, and has a bumper opening 1.
2 from upper part 14A of cooler condenser 14
It is designed to be guided to the vicinity.

A pressure control plate 26 is formed integrally with the lower edge of the bumper opening 12. This pressure control plate 26
Is curved in an arc shape toward the rear upper side of the vehicle body, and guides the air from the bumper opening 12 to the condenser front space 27 which is the front part of the upper part from near the vertical center part 14B of the cooler condenser 14. It has become.

An air cut portion 30 is formed on the rear edge of the extra duct 18. This air cut part 3
Reference numeral 0 denotes a front portion 16A of the under plate 16 formed along the air flow flowing in the direction of the under plate 16 along the lower surface 11B of the bumper 11, and extends from the front portion 16A toward the lower portion 14C of the cooler condenser 14. Baffle plate 3
When the air pressure in the extra duct internal space 34 becomes lower than the air pressure in the extra duct external space 36, the air cut portion 30 moves toward the under plate 16 along the lower surface 11B of the bumper 11. A part of the flowing air flow is directed toward the cooler condenser 14.

The operation of the embodiment will be described below. In the air resistance reducing vehicle front structure of the present embodiment, as shown in FIG. 4, when the vehicle enters a high speed state, the air W1 blown from the bumper opening 12 is sent to the cooler condenser 14 along the pressure control plate 26. Can be At this time, the air pressure sent to the cooler condenser 14 is large,
7, the air pressure in the extra duct internal space 34 increases, and the extra duct external space 36
Equal to or greater than the air pressure.

Therefore, the air W2 flowing in the direction of the under plate 16 along the lower surface 11B of the bumper 11 does not enter the extra duct interior space 34 through the extra duct 18, and the front portion 16A of the under plate 16
Therefore, air resistance during high-speed running can be reduced, and high-speed fuel efficiency can be improved.

On the other hand, as shown in FIG. 5, when the vehicle is traveling uphill, the air pressure blown from the bumper opening 12 is lower than in a high-speed state. Therefore, the air W3 blown from the bumper opening 12 is sent along the pressure control plate 26 to a portion above the cooler condenser 14 as compared with the high-speed state. For this reason, the air pressure in the space 27 before the condenser is lower than in the high-speed state, and the air pressure in the extra duct space 34 is also lower than in the high-speed state.

When the air pressure in the extra duct space 34 is lower than that in the high speed state, the extra duct space 3
4 is smaller than the air pressure in the extra duct outer space 36, a part of the air W4 flowing toward the under plate 16 along the lower surface 11B of the bumper 11 is transferred to the extra duct inner space 34 by the air cut portion 30. It is taken in and sent to the cooler condenser 14. Therefore, the cooling performance during uphill traveling can be satisfied.

When the vehicle is traveling at an intermediate speed at an uphill traveling state, the ratio of the air resistance to the total traveling resistance of the vehicle body 10 is small. Therefore, the air resistance caused by taking the air into the extra duct space 34 through the extra duct 18 is reduced. The effect of the increase in fuel consumption on fuel economy is very small.

Further, the front structure of the vehicle with reduced air resistance according to the present embodiment does not require a movable grille, an actuator or the like as in the prior art, so that there is no increase in weight and cost.

As shown in FIG. 6, the pressure control plate 2
6 is adjusted by the ventilation resistance of the cooler condenser 14, the cooling fan 20, the radiator 22, and the like. For example, the cooler condenser 14, the cooling fan 2
0, the air pressure of the condenser front space 27 and the air pressure of the extra duct space 34 increase when the ventilation resistance due to the radiator 22 or the like is large. 26 is warped upward to increase the warpage angle θ1. If the ventilation resistance due to the cooler condenser 14, the cooling fan 20, the radiator 22, or the like is small, the condenser front space 27
And the air pressure in the extra duct space 34 becomes lower, as indicated by the broken line to compensate for these,
The warpage is reduced upward to reduce the warpage angle θ2, or the pressure control plate 26 is reversely warped.

[0025]

The front structure of the air resistance reducing vehicle according to the present invention is as follows.
In front of an automobile having a bumper disposed along a vehicle width direction at a front end portion of a vehicle body, a cooled body provided in an engine room and cooled by outside air, and an underplate disposed on a lower surface of the engine room. In the vehicle body structure, a front outside air intake formed on the front surface of the bumper, a pressure control plate forming an inner peripheral lower portion of the front outside air intake and curving upward toward the rear of the vehicle body, and a front position of the cooled object A lower external air intake provided between the lower surface of the bumper and the underplate, and an underplate provided behind the lower external air intake and having a shape along the airflow flowing in the direction of the underplate along the lower surface of the bumper. A front portion, and a baffle plate extending from the air cut portion at the front end of the under plate toward the cooled object ,
Air pressure blown from front outside air intake by pressure control plate
From the front of the cooled body to the inside of the lower outside air intake
Since the air pressure at the end of the road is changed, it is possible to reduce the air resistance during high-speed running without increasing the weight and cost, and to satisfy the cooling performance during uphill running. Have.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an air resistance reducing vehicle front structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of the vehicle body to which the air resistance reduction vehicle front structure according to one embodiment of the present invention is applied, as viewed from an obliquely front upper side of the vehicle body.

FIG. 3 is a perspective view of the vehicle body to which the air resistance reduction vehicle front structure according to one embodiment of the present invention is applied, viewed from diagonally lower front of the vehicle body;

FIG. 4 is a side sectional view showing a high-speed running state of the air resistance reducing vehicle front structure according to one embodiment of the present invention.

FIG. 5 is a side sectional view showing an uphill running state of the air resistance reducing vehicle front structure according to one embodiment of the present invention.

FIG. 6 is a side sectional view showing a modified example of the air resistance reducing vehicle front structure according to one embodiment of the present invention.

FIG. 7 is a side sectional view showing a high-speed running state of a front structure of a vehicle with reduced air resistance according to a conventional example.

FIG. 8 is a side sectional view showing an uphill traveling state of a conventional structure of a front part of a vehicle with reduced air resistance.

[Explanation of symbols]

 Reference Signs List 11 front bumper 11A front surface 11B bottom surface 12 bumper opening (front outside air intake) 14 cooler condenser (cooled body) 16 underplate 16A front 18 extra duct (lower outside air intake) 26 pressure control plate 27 condenser front space 30 air Cut part 32 Air guide plate 34 Extra duct internal space 36 Extra duct external space

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F01P 7/10 F01P 11/10 B60K 11/04 B60K 11/08 B60R 19/48

Claims (1)

(57) [Claims] 1. A bumper disposed at a front end of a vehicle body along a vehicle width direction, a body to be cooled provided in an engine room and cooled by outside air, and an underplate disposed on a lower surface of the engine room. In the front body structure of an automobile having a front outside air intake formed on the front surface of the bumper, a pressure control plate that forms the lower inner peripheral portion of the front outside air intake and curves toward the rear upper side of the vehicle, A lower outside air inlet provided between the lower surface of the bumper at the front position of the object to be cooled and the underplate; and an airflow provided in the rear of the lower outside air inlet and flowing in the direction of the underplate along the lower surface of the bumper. and the under plate front portion is shaped along a baffle plate extending to the object to be cooled the direction from the air-cut portion of the under-plate front tip comprises, by the pressure control plate, the front
Cooled by air pressure blown from outside air intake
Empty space from the front of the body to the inside of the lower outside air intake
An air resistance reduced vehicle front structure characterized by changing the atmospheric pressure .